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Plus Advent Calendar Door #12: 1, 2, 3, ...
There's nothing simpler than 1,2,3, ...
Content about “ Advent calendar 2013
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Plus Advent Calendar Door #10: Positional genius
Thank goodness for the number 10!
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Plus Advent Calendar Door #9: The missing pound
We're keeping a watchful eye on the Christmas pounds behind door number 9...
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Plus Advent Calendar Door #8: Counting infinities
How do I love infinity? Let me count the ways....
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Plus Advent Calendar Door #7: Seven is lucky!
Seven is a lucky number. No, seriously, it is!
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Plus Advent Calendar Door #6: Six out of forty-nine
What's your chance of winning the lottery?
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Plus Advent Calendar Door #5: Five won't fit
Triangles do it, squares do it, even hexagons do it — but pentagons don't. They just won't fit together to tile your bathroom wall.
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Plus Advent Calendar Door #4: Four is fine
How to colour a map
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Plus Advent Calendar Door #3: Watch your middle!
Make a fractal in infinitely many simple steps!
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Plus Advent Calendar Door #2: Who will come second?
When Archilles and the tortoise race, who will come second? Find out behind door number two!
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Plus Advent Calendar Door #1: Looking out for number one
How can the number one help spot fraud in tax returns, elections, or mistakes in data sets? Find out behind door number 1!
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Sneek peek at this year's advent calendar!
It's nearly time for the Plus Advent Calendar!